My Mac keeps broadcasting UDP packets to 255.255.255.255:2008

Question

The source port changes rapidly, from 49xxx to 6xxxx. I tried to use lsof -i udp, and see there's process named mDNSRespo which holds a lot of udp sockets. However, none of these sockets' ports are of source ports of sockets broadcasting packets.

Is there a utility to find out which process is doing this?

Solution 1

Found this same issue today, check to see if "Remote Mouse" is installed, that was the culprit on my network.

Solution 2

Its probably Bonjour, and its basically throwing out broadcasts to advertise its presence. You can use good old netstat, either in cli or through network utility to determine this. If you're using cli, also consider using grep to filter through the results, and the -b switch to display the binary's name - I'd use something like netstat -abn | grep 255.255.255.255 - which if i recall should show all connections, and list the binaries and ip addresses, and greps for that ip address.

Comments

[codable]

I stopped Bonjour, and it still keeps broadcasting..

[Thalys]

What does netstat say?

[Jason C]

This seems like a potentially helpful, albeit not ideal, answer to me.